Fire extinguisher



FIG. 1 is a right side view of a fire extinguisher showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a back side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a front right side perspective view thereof.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a fire extinguisher, as shown and described. 